I would be very careful about using Pascal style Objects in any *new* Delphi
code. This is due to Borland's explicit mention that they are only supported
for backward compatibility. Evidence of this can already be seen with Delphi
5 not supporting long strings inside Pascal Objects - a feature stopping us
from moving to D5 right now.
As long as you have a consistent convention regarding the ownership of
objects being passed around then it would probably be better to do them as
TObjects, even with the slight bit of overhead.
Xander
----- Original Message -----
From: Wilfred Verkley <[EMAIL PROTECTED]>
To: Multiple recipients of list delphi <[EMAIL PROTECTED]>
Sent: Thursday, December 09, 1999 10:13 AM
Subject: RE: [DUG]: Passing objects as procedure parameters
> >This is purely syntactical and the help explains this. In BP7 (old way),
> >you always do a '^.', but Borland changed that to '.' in Delphi. Its not
a
> >lie. It is the way Delphi has been designed, and IMHO, is better than
the
> >'^.' construct, and certainly better than C++'s '.' and '->' constructs.
I
> >guess the only down-side to using '.' is that it is used to denote fields
> in
> >records, thus making its use inconsistent.
>
> This "implicit referencing" isnt just for objects, you can use it for
record
> structures as well.
>
> TRecordA = record
> value : integer;
> end;
>
> TRecordB = record
> recordA : ^TRecordA;
> end;
>
> recordB.recordA.value := 123;
>
> >However, IMHO, OO programming ought not to use records anyway.
>
> Why not? Should something simple like TPoint be an object? Objects can
> also be a nuicense when you just want to hold and pass around simple data.
> I still use records or the old BP7 object model sometimes for simple data
> types.
>
> i.e.
>
> TMyPoint = object
> public
> x, y : double;
> function length : double;
> ...
> end;
>
> You can define arrays of them, pass them around by value, you dont have to
> dynamically create and destroy them etc etc.
> --------------------------------------------------------------------------
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> New Zealand Delphi Users group - Delphi List - [EMAIL PROTECTED]
> Website: http://www.delphi.org.nz
>
>
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